{{cite journal | last1=Haider | first1=M. S. | author2=M. Bilal | author3=H. Ahmed | author4=M. Anwar | author5=A. Sattar | author6=S. M. H. Andrabi1 | year=2017 | title=EFFECT OF CIDR WITH OR WITHOUT GnRH AND DOUBLE PGF2α BASED ESTRUS SYNCHRONIZATION PROTOCOLS ON ESTRUS RESPONSE AND PREGNANCY PER AI IN NON-DESCRIPT COWS OF THE PUNJAB | journal=Journal of Animal and Plant Sciences | volume=27 | issue=4 | pages=1108-1114 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2017-JAPS-139}}